CORRECTION OF QUADRATURE PHASE AND GAIN MISMATCH IN RECEIVER DOWN-CONVERSION USING A DUAL CORDIC ARCHITECTURE

摘要

A first section configured to receive the analog radio signal and to generate digital intermediate frequency I and Q channel samples from the analog radio signal and a second section configured to convert the I and Q channel samples to a lower baseband frequency And a second section comprising: a first coordinate rotation digital computer module configured to perform complex rotation of I channel samples; a second coordinate rotation digital computer module configured to perform complex rotation of Q channel samples; And a phase accumulator configured to provide an output signal indicative of a complex rotation applied to each of the I and Q channel samples, and wherein the second section includes a phase accumulator output signal that is phase modulated by the first coordinate rotation digital computer and the second coordinate rotation digital computer To be corrected by the phase offset signal before being applied to one .